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Finding the Fourth Proportional to 426,293.69, 639,664.70 and 173,760.80

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Solution

The fourth proportional to 426,293.69, 639,664.70 and 173,760.80 is: 260,732.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,293.69 : 639,664.70 = 173,760.80 : x
  2. Step 2: Convert to fraction form
    426,293.69/639,664.70 = 173,760.80/x
  3. Step 3: Cross multiply
    426,293.69x = 639,664.70 × 173,760.80
  4. Step 4: Simplify right side
    426,293.69x = 111,148,645,936.63
  5. Step 5: Solve for x
    x = 111,148,645,936.63/426,293.69
  6. Step 6: Final answer
    x = 260,732.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.